On October 1, 2015, the U.S. Environmental Protection Agency (EPA) announced a new eight-hour standard of 70 ppb for ground-level ozone, one of the principal components of smog. Read more about the new standard. Learn more about the U.S. EPA’s regulatory actions for making designations for the 2015 ozone standard here.

Santa Barbara County

The EPA determines whether an area is considered in attainment of the federal eight-hour ozone standard based on the fourth highest level of ozone recorded at monitoring stations in a three-year period. The county is in attainment of the existing eight-hour federal ozone standard, but does not meet the state eight-hour ozone standard. Based on current data, the county is in attainment of the new federal ozone standard. The EPA has made attainment designations for some regions of the U.S. for the new standard; however, they have not yet made designations for Santa Barbara County. The designation will likely be based on 2014-2016 air quality data, and CARB has recommended that the county be designated attainment for the 2015 standard.

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